Forging machine for upsetting or simultaneous upsetting and bending



March 19, 1968 'r. RUT 3,373,593

FQRC'ING MACHINE FOR UPSETTING OR SIMULTANEOUS UPSETTING AND BENDING 3 Sheets-Sheet 1 Filed May 7, 1965 F/GfZ MENTOR TADEUSZ RUT BY $ss ATTORNEYS March 19, 1968 Ru'r 1 1,373,593

FORC-ING MACHINE FOR UPSETTING OR SIMULTANE UPSETTING AND BENDING Filed May 7. 1965 3 Sheets-Sheet 2 INVENTOR TAozusz RUT ATTORNEY 6 T. RUT 3,373,593 G MACHINE FOR UPSETTING OR SIMULTANEOUS March 19, 1968 FORGIN UPSETTING AND BENDING 3 Sheets-Sheet 3 Filed May 7, 1965 FIG] F/aa

INVENTOR TADEUSZ RUT BY c m ATTORNEYS United States Patent Ofifice 3,373,593 FORGING MACHINE FOR UPSETTING OR SIMUL- TANEOUS UPSETTING AND BENDING Tadeusz Rut, Nowe Zagorze 14, Poznan, Poland Filed May 7, 1965, Ser. No. 453,993 Claims priority, application Poland, May 8, 1964,

P 104,504; Sept. 2, 1964, P 105,627

Claims. (Cl. 72399) The present invention relates to improvements concerning a device and particularly a forging machine for upsetting and simultaneous upsetting and bending of material like bars, rods or ingots.

Devices, machines or the like for upsetting or upsetting with simultaneous bending driven by means of a press are known. Among others there are devices known which are composed of a crown of a press and of a bank, between which sets of upper and lower die tools are placed, where the bottom die tools are slidably mounted whereas the upper ones are fixed to the punch holder by means of at least one swinging articulated link. This link or links are inclined in relation to a line perpendicular to the axis of the die tools at an angle greater than 0 and smaller than 90. When the press acts on the punch holder of the device then, owing to such mounted links, a clamp of the upper die tools with the lower ones is assured and the fastening of the worked bar, rod or the like is obtained and, when the pressure is growing a slide of the die tools in a direction perpendicular to that of the moving punch holder is caused. Such devices are provided with a bending tool to produce the desired flexure.

The inconveniency of such devices was that after the forming of the crank, when the bending tool was withdrawn, there occurred a lifting of the piece being shaped, and during the upsetting operation the worked material could flow freely on sides. In the case of shaping a crankshaft it was not possible to get directly at once the desired proper shape of the crankweb.

Furthermore in known devices the axes of the bearing pins of the links in the die tools were placed in the parting plane of the die tools or in the axis plane of the rod, bar or the like to be shaped. Such a position of the axis of the bearing of the link in the die tool is not always advantageous.

The aim advantages.

According to this invention it is possible to eliminate the first of the cited disadvantages by providing the device with automatic crank keepers, pivotally mounted in the bottom die tool.

In order to eliminate the second above named disadvantage and to get the suitable positioning of the link bearings it is indicated and it depends on the construction of these hearings, to place the axis of the bearings of the links in the die tools either above or below the parting plane of the die tools or the axis plane of the element to be upset. Such solution is indicated for reasons of kinematic and construction, because it is indicated to tend to have the bearing of the link in the die tool located at such a place, that the pressing of the horizontal component of forces acts in the parting plane of the die tools, when the upsetting takes place.

Owing to the fact that the pressing point of the horizontal component of force is submitted in practice to a shifting during the working stroke, it is necessary to try, during the working stroke, to have this pressing point as near as possible to the parting plane of the die tools. By such a locating of this point there are no overturning moments in the die tool appearing.

The position of the axis of the link bearing in the die of this invention is to eliminate these dis- 3,373,593 Patented Mar. 19, 1968 tool depends at first from the shape of the applied link and from the kind of bearings, as Well as of the shape, the die tools have.

The examples of manufacture of the device according to the invention are presented on the drawings, the FIG. 1 of which represents this device in side view (at left side-there is the position of the same before the working stroke, and at right side the position of the device just at the moment of closing of the tool); FIG. 2 illustrates this device in side view (on the left hand-there is the position at the end of the working stroke shown, whereas on the right hand-after the die tools are opened); FIG. 3 represents this device in cross section (on the left along line A-A on FIG. 1, on the right along line B-B on FIG. 1); FIG. 4 shows a cross section of this device along the line FF on FIG. 3; FIG. 5 represents this device in cross section (on the left sidealong line CC on FIG. 2, and on the right side along line D-D on FIG. 2); FIG. 6 represents this device in cross section along line EE on FIG. 5; FIG. 7 shows a variety of the devices of FIG. 1 in side view, in a position after the upsetting has been performed, and FIG. 8 represents another embodiment of the construction of the device, when the die tools are closed.

In the device represented on FIGS. 1-6, the upper ends of the links 2 are mounted on pins 11 in the punch holder 1. The lower ends of the links 2 are mounted on pins 12 in the upper die tools. The bottom die tools 4 are placed slidably on the bank 5 of the device.

In the starting position the die tools 3 and 4 lean against the buffers 6 and 7. The number 8 indicates the worked object. The upper die tools 3 have protrusions 9, which, when the die tools 3 and 4 are touching each other, enter in suitable recesses 10 of the lower die tools '4. Number 13 indicates the bending tool, which serves for the bending of the worked bar, rod or the like. In the lower die tools 4 there are swinging keepers 14 mounted. These keepers 14 are provided with inclined guiding surfaces 15, surfaces 16 for shaping the crank 17 and surfaces 18, Which lean against the upper die tool 3, when the die tools are closed. Each of these keepers 14 is provided with pins 19, by means of which it is pivotally mounted inside the lower die tool 4.

During the working stroke the upper die tool 3 approaches the lower one 4 and produces, owing to the pressure on the inclined guiding surfaces of the keeper 14 a pivoting motion towards the worked piece 8. The crank 17 being upset leans against the shaping surfaces 16 of the keeper 14, owing to which the crankweb is suitably shaped on its sides.

During the rear movement of the punch holder (FIG. 5left side) the bending tool 13 is withdrawn from the crank after being upset, and the keeper 14 leaning with its side surface 18 against the upper die tool 3 holds the crank 17 in proper position in the lower die tool 4. After the upper die tool 3 is withdrawn to a certain distance (FIG. 5-right side) from the lower die tool 4 the keeper 14 is no longer held by the upper die tool 3 in its working position and can be pivoted into its initial position.

This renders free the forged piece, which can be with-.

drawn from the die tool.

The device according to this invention can be provided with one or more keepers 14.

FIGS. 7 and 8 illustrate two other varieties of construction of the device according to this invention, whereby in the device according to FIG. 7 the axes of the bearings of the links in the die tools are placed above the parting plane of the die tools, whereas in the construction according to FIG. 8 these axes are located beneath the parting plane of these dies.

As shown on FIG. 7 the axis of the pin 12 of the link 2 is placed above the parting plane of the die tools, or above the plane along the longitudinal axis of the worked piece 8. Such a position of the axis of the pin 12 has been applied, in order to have the pressing .point P of the horizontal component of force, producing the upsetting of the piece 8, as near as possible to the parting plane of the die tools.

In the embodiment shown on FIG. 8 the bearings of the links 2 are executed as segments 12a of a cylinder. In this case the pressing point P of the horizontal component of force lies above the axis of the segment 12a of cylinder, which is fixed to the die tool. The axis of the segment 12a is located below the parting plane of the die tool.

Having now fully described my invention what I claim is:

1. A device for upsetting, as well as upsetting with simultaneous bending driven by a press, provided with a punch holder, a base, between which sets of die tools are placed, whereby-the lower die tools are slidably mounted on the base and the upper ones fixed to the punch holder by means of inclined pivoting links, provided with bearings in the punch holder and in the upper die tools, characterised by this, that it is provided with keepers (14) for the forged 'piece (8), pivotally mounted in the lower die tools (4) 2. Device according to claim 1, characterised by said keeper (14) being provided with inclined guiding sur- 4 faces (15), sliding on the surfaces of the upper die (3), which cause its closing during the approaching of the dies (3) and (4) to each other.

3. Device according to claim 1, characterised by this, that the keeper (14) has side surfaces (18) lying against the upper die (3), after the die tools (3) and (4) are closed.

4. Device according to claim 1, characterised by this, that the keeper (14) is provided with pins (19), which form the bearings in the lower die tool (4).

5. Device according to claim 1, characterised by this, that the axes of said bearing (2) in the dies are located above or beneath the parting plane of the die tools or the plane along the longitudinal axis of the worked piece (8) at such a place, that the pressing point (P) of the horizontal component of forces, producing the upsetting, is situated as near as possible to the parting plane of the die tools or to the plane along the longitudinal axis of the said worked .piece.

References Cited UNITED STATES PATENTS CHARLES W. LANHAM, Primary Examiner.

R. D. GREFE, Assistant Examiner. 

1. A DEVICE FOR UPSETTING, AS WELL AS UPSETTING WITH SIMULTANEOUS BENDING DRIVEN BY A PRESS, PROVIDED WITH A PUNCH HOLDER, A BASE, BETWEEN WHICH SETS OF DIE TOOLS ARE PLACED, WHEREBY THE LOWER DIE TOOLS ARE SLIDABLY MOUNTED ON THE BASE AND THE UPPER ONES FIXED TO THE PUNCH HOLDER BY MEANS OF INCLINED PIVOTING LINKS, PROVIDED WITH BEARINGS IN THE PUNCH HOLDER AND IN THE UPPER DIE TOOLS, CHARACTERISED BY THIS, THAT IT IS PROVIDED WITH KEEPERS (14) FOR THE FORGED PIECE (8), PIVOTALLY MOUNTED IN THE LOWER DIE TOOLS (4). 